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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
I agree with Joe. That looks just like the end connection of one or more of the emissions hoses on the intake. If you pulled those from the intake manifold, and those going to the LF emissions solenoid(on frame next to radiator), you would find the match. I'd say it came with the part to seal the hole until assembly. I recall those two ridges and the size when assembling my SOHC engine three years ago. Regards,